Spatially and temporally joint optimum transmitter-receiver based on adaptive array antenna for multi-user detection in DS/CDMA

We have proposed a spatially and temporally optimum receiver based on an adaptive array antenna. However, equalization in the transmitter, that is, partial response signaling (PRS) or precoding, is also possible in a two-way interactive communication such as time or frequency division duplex (TDD or FDD). This paper proposes and investigates a joint transmitter and receiver system using an adaptive array antenna which is optimized in both time and space domains. Symbol error rate or achievable transmission rate can be improved in the super channel which includes array antennas in both the transmitter and receiver. This result contributes towards establishing the spatial and temporal communication theory as well as solving the practical problem due to fading in mobile communications